Lungs Cancer | Symptoms, Types, causes, treatment & 4 stages

Lungs Cancer

Cancer is a condition when a few of the body’s cells grow out of control and spread to other bodily regions.

Cancer may develop practically anywhere in the millions of cells that make up the human body. Human cells often divide (via a process known as cell growth and multiplication) to create new cells when the body requires them. New cells replace old ones when they die due to aging or injury.

Occasionally, this systematic process fails, causing damaged or aberrant cells to proliferate when they shouldn’t. Tumors, which are tissue masses, can develop from these cells. Tumors may or may not be malignant (benign).

What are the stages of Lungs Cancer?

There are different types of Lung cancer stages.

Non-small cell Lungs Cancer stages

Stages one through four of non-small cell lung cancer are often expressed in Roman numerals (0 through IV). The prognosis is better the earlier in the lung cancer stage the disease has spread.

Stage 0

Non-small cell lung cancer is a form of the disease still in its early stages and has not progressed beyond the top layer of the lung or bronchus (carcinoma/tumor in-situ).

Stage I

Based on the size of the tumor, non-small cell lung cancer (NSCLC) is split into two sub-stages, 1A and 1B. Cancer that is in Stage I NSCLC has not progressed to the lymph nodes or other organs.

Stage II

Depending on the size of the tumor, where it is discovered, and whether or not the disease has progressed to the lymph nodes, non-small cell lung cancer is classified into stages IIA and IIB, with each stage being further subdivided. These tumors could be more substantial than those in stage I or they might have started to spread to surrounding lymph nodes. Not one distant organ has been affected by the malignancy.

Stage III

Depending on the size, location, and extent of the tumor, stage IIIA, IIIB, or IIIC lung cancers are identified. Most frequently, the malignancy has progressed to the mediastinal lymph nodes (the area in the chest between the lungs).

Stage IV

The most advanced type of lung cancer is called non-small cell lung cancer (NSCLC). Stage IV refers to the spread of cancer to other parts of the body or the lining of the lung.

Small cell Lungs Cancer stages

Small cell lung cancer is described using two stages: limited and extensive.

Limited stage lung cancer is only in one lung with or without spread to the lymph nodes in the mediastinum (area in the chest between the lungs).

Extensive-stage lung cancer has spread to tissue outside of the originally affected lung like the opposite lung or distant organs.

Types of Lungs Cancer

Small cell lung cancers (SCLC) and non-small cell lung cancers are the two main kinds of lung cancer (NSCLC). This categorization is based on how the tumor cells appear under the microscope. Making a differentiation between these two types of tumors is crucial because they differ in how they develop, spread, and are handled.


represent up to 40% of instances of lung cancer and are the most prevalent kind of NSCLC in the U.S. Adenocarcinomas, like other types of lung cancer, are linked to smoking, although non-smokers, particularly women, can also get this kind of lung cancer. The exterior, or peripheral, parts of the lungs are where most adenocarcinomas develop. They also frequently spread to the lymph nodes and other places. Adenocarcinoma in situ is a kind of adenocarcinoma that usually appears at many locations in the lungs and spreads along the underlying alveolar walls. It was formerly known as bronchioloalveolar carcinoma. A chest X-ray may also show pneumonia-like symptoms. It occurs more frequently now and more frequently in women.


contains between 10 and 15 percent of lung cancers. The most aggressive and quickly spreading kind of lung cancer is this one. SCLC and cigarette smoking have a close connection. SCLCs travel quickly to several locations inside the body and are frequently only found after they have dispersed widely.

Squamous cell carcinomas

were more frequent than adenocarcinomas in the past; nowadays, they make up roughly 25% to 30% of all lung cancer occurrences. The bronchi in the center of the chest are where squamous cell malignancies most usually develop. Most frequently, this form of lung cancer stays inside the lung, spreads to the lymph nodes, and gets rather big, causing a cavity.

Bronchial carcinoids

represent up to 5% of lung cancer cases. When diagnosed, these tumors are often tiny (3-4 cm or less) and most frequently affect people under the age of 40. Carcinoid tumors can spread and a tiny percentage of these tumors release hormone-like compounds independently of cigarette smoking. Many carcinoids are discovered early enough to be surgically removed, and they often develop and spread more slowly than bronchogenic malignancies.
There are very few lung cancers that affect the smooth muscle, blood arteries, or immune system-related cells.

Symptoms of Lungs Cancer

The most  common symptoms of lung cancer are
  • a persistent or worsening cough
  • coughing out sputum that is scarlet or rust-colored (spit or phlegm)
  • Chest pain that frequently becomes worse when you cough, laugh or take deep breaths
  • Hoarseness
  • reduced appetite
  • Unaccounted-for weight loss
  • breathing difficulty
  • being worn out or fragile
  • infections like bronchitis and pneumonia that recur or don’t go away
  • newly developing wheezing
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Causes of Lungs Cancer

Lung cancer may affect everyone. When lung cells mutate or alter, lung cancer results. This mutation, which is a permanent alteration to a gene’s DNA sequence, can occur for a number of reasons. People who breathe harmful or poisonous chemicals most frequently experience this alteration in their lung cells. Lung cancer risk exists even if you were exposed to these drugs a long time ago. If you have been exposed to any of the compounds mentioned below, speak with your doctor and take precautions to lessen your risk and safeguard your lungs.
  • Smoking
Everyone may develop lung cancer. Lung cancer develops when lung cells change or mutate. There are several causes for this mutation, which is a permanent change to a gene’s DNA sequence. This change in lung cells most typically occurs in people who breathe dangerous or deadly compounds. Even if you were exposed to these medications years ago, there is still a danger of developing lung cancer. Speak with your doctor if you have been exposed to any of the substances listed below so that you may take action to lower your risk and protect your lungs.
  • Radon

The second most common cause of lung cancer is radon exposure. A radioactive gas called radon, which has no color or smell, naturally occurs in soil. It rises from the ground and penetrates structures through tiny openings and fissures. In the US, radon exposure affects 1 in every 15 houses. Your chance of developing lung cancer is significantly increased by radon exposure and cigarette smoking.

  • Hazardous Chemicals

Lung cancer risk is associated with exposure to several dangerous substances. It is particularly risky to work with substances like asbestos, uranium, arsenic, cadmium, chromium, nickel, and certain petroleum products. Speak to your employer and doctor if you believe you may be breathing in dangerous chemicals at work to find out how to protect yourself.

Treatment Of Lungs Cancer

The patient’s health state, the type of tumor, and the extent of its dissemination are all taken into consideration while creating the best possible treatment plan for that person’s cancer.


It is incredibly difficult to treat lung cancer. The most important criteria in influencing the survival rate are the cell type and stage at the time of diagnosis. Those that are treatable may have a confined diagnosis. Unfortunately, the majority of patients receive a diagnosis after cancer has moved outside of the chest (distant or advanced) or has affected the chest nodes (regional). Additionally, since they are such delicate organs, the lungs may not respond well to some treatments.

Lung cancer has one of the lowest survival rates of all malignancies, which is explained by this combination. Lung cancer patients often have a 25% two-year survival rate. The survival rate falls to 15% at five years.
It’s crucial to go over the intended outcomes of lung cancer treatment with your doctor. Cancer may be controlled with some therapy. Others are used to lessen symptoms or enhance the quality of life. Both of these therapeutic options are available.
  • Targeted treatments and chemotherapy
  • Radiation Therapy
  • Surgery

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